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Perfusion is measured as the rate at which blood is delivered to tissue, [2] or volume of blood per unit time (blood flow) per unit tissue mass. The SI unit is m 3 /(s·kg) [citation needed], although for human organs perfusion is typically reported in ml/min/g. [3] The word is derived from the French verb perfuser, meaning to "pour over or ...
In cases where loss of blood volume is clearly attributable to bleeding (as opposed to, e.g., dehydration), most medical practitioners prefer the term exsanguination for its greater specificity and descriptiveness, with the effect that the latter term is now more common in the relevant context.
This glossary of biology terms is a list of definitions of fundamental terms and concepts used in biology, the study of life and of living organisms.It is intended as introductory material for novices; for more specific and technical definitions from sub-disciplines and related fields, see Glossary of cell biology, Glossary of genetics, Glossary of evolutionary biology, Glossary of ecology ...
It can describe an increase in the number of red blood cells [1] ("absolute polycythemia") or to a decrease in the volume of plasma ("relative polycythemia"). [2] Absolute polycythemia can be due to genetic mutations in the bone marrow ("primary polycythemia"), physiologic adaptations to one's environment, medications, and/or other health ...
denotes something as "the same" as another or common Greek ὁμός (homós), the same, common homosexuality, homozygote, homophobic humer(o)-of or pertaining to the shoulder (or [rarely] the upper arm) Latin umerus, shoulder humerus: hydr(o)-water Greek ὕδωρ (húdōr), water hydrophobe, hydrogen hyper-extreme or beyond normal
The cornerstone of treatment is administration of free water to correct the relative water deficit. Water can be replaced orally or intravenously . Water alone cannot be administered intravenously (because of osmolarity issues leading to rupturing of red blood cells in the bloodstream), but rather can be given intravenously in solution with ...
Medical terms related to blood often begin with hemo-, hemato-, haemo-or haemato-from the Greek word αἷμα (haima) for "blood". In terms of anatomy and histology, blood is considered a specialized form of connective tissue, [8] given its origin in the bones and the presence of potential molecular fibers in the form of fibrinogen.
Blood viscosity is a measure of the resistance of blood to flow. It can also be described as the thickness and stickiness of blood. This biophysical property makes it a critical determinant of friction against the vessel walls, the rate of venous return, the work required for the heart to pump blood, and how much oxygen is transported to tissues and organs.